baber/WOPTO huggingface dataset:
Patent KR-20210058607-A (KR)
Title: 일종의 자석 블록
Inventor: ZHOU ZHIWEI
IPC: A63H33/04
Filed: 2018-10-10
Abstract: 본 발명은 자석 블록에 관한 것으로, 틀형 구조의 테두리에 약간의 자석을 설치한 자성 구조와 상기 약간의 자성 구조와 일체화된 틀형 구조를 포함하며, 매개 자성 구조는 강관; 강관 내에 설치된 자석; 강관 양쪽 끝에 설치된 마개를 포함한다. 본 발명은 틀형 구조와 일체화된 자성 구조를 통하여 장기간 자석 블록을 사용하여도 자성 구조가 자석 블록에 부착되어 있도록 하여 자성 구조의 파손과 탈락 등 문제를 해결하였다.
Patent KR-20190115476-A (KR)
Title: 선박
Inventor: OZAKI TOMOAKI
IPC: B63B17/00
Filed: 2017-08-25
Abstract: 선체 내에 마련된 주기와, 선체에 마련되어, 주기의 연료로서의 LPG를 저장하는 연료 탱크(50)와, 선체에 마련되어, 화물로서의 LPG를 저장하는 카고 탱크(30)와, 카고 탱크(30)에 접속됨과 함께 선체의 외부에 접속되는 외부 접속구를 갖는 카고 라인(120)과, 카고 라인(120)에 마련된 긴급 차단 밸브(150)와, 카고 라인(120)에 있어서의 긴급 차단 밸브(150)보다 카고 탱크(30) 측에서, 그 카고 라인(120)과 연료 탱크(50)를 접속하는 연료 라인(160)을 구비한다.
Patent KR-20200106003-A (KR)
Title: 공기 조화기 실내기
Inventor: PENG DAIJIE
IPC: F24F13/20
Filed: 2019-03-28
Abstract: 공기 조화기 실내기(100)는 배판 부재(1); 헤드커버 부재(5); 및 제1 송풍구(211a) 및 제2 송풍구(211b)가 설치되어 있고 단독 가공된 성형 부재인 제1 패널(21), 제1 패널(21)의 하부에 설치되고, 단독 가공된 성형 부재인 제2 패널(22), 가이드홈(231)이 설치되어 있는 개폐문 장착판(23) 및 개폐문 장착판(23)에 대해 이동 가능하여 제1 송풍구(211a)를 개폐하고, 가이드홈(231) 내에 삽입되고 가이드홈(231)에 대해 슬라이드 가능한 가이드 기둥(241)이 설치되어 있는 개폐문을 포함하는 패널 부재(2);을 포함한다.
Patent KR-20190137117-A (KR)
Title: 반사방지 부재 및 그 제조 방법
Inventor: YAMANE YUJI
IPC: C09D171/02
Filed: 2018-03-08
Abstract: 기재 위의 다층 반사방지층 표면의 제곱 평균 평방근 면 거칠기가 0.8nm 이상 2.0nm 이하인 다층 반사방지층 위에, 불소 폴리머 부분의 수평균 분자량이 4,500 이상 10,000 이하인 플루오로옥시알킬렌기 함유 폴리머 변성 유기 규소 화합물 및/또는 그 부분 가수분해 축합물을 주성분으로 하는 발수발유제의 경화물인 막 두께 1∼30nm의 발수발유층을 갖는 반사방지 부재가 우수한 표면 미끄럼성, 발수발유성과 내구성을 갖는 반사방지 부재로 될 수 있다.
Patent KR-20190139979-A (KR)
Title: 물품 및 그의 제조 방법
Inventor: MAURI STEFANO
IPC: C23C18/20
Filed: 2018-04-19
Abstract: 본 발명은 퍼플루오로중합체로부터 제조된 다층 물품 및 그의 제조 방법에 관한 것으로, 상기 다층 물품은 적어도 하나의 용융가공성의 완전히 플루오린화된 중합체(FMP)를 포함하는 조성물(C)로 제조되고, 상기 물품은 적어도 하나의 표면(S)을 갖고, 상기 표면(S)은 상기 표면(S) 상에 그래프트된 적어도 하나의 분자(상기 분자는 적어도 하나의 질소 원자 및 적어도 하나의 탄소 원자를 포함함), 및 적어도 하나의 금속 화합물(M)을 포함하는 상기 표면(S)에 부착된 적어도 하나의 층(LI)을 포함한다.
Patent KR-20190133273-A (KR)
Title: 적층 제조 장치를 위한 에너지 소스들의 어레이를 갖는 에너지 전달 시스템
Inventor: NG HOU T
IPC: B29C64/209
Filed: 2018-04-13
Abstract: 적층 제조 장치는, 플랫폼, 지지부, 플랫폼 및 지지부 중 적어도 하나에 결합되고 지지부가 플랫폼에 걸쳐 스캐닝하도록 제1 축을 따른 지지부와 플랫폼 사이의 상대적인 움직임을 생성하게 구성되는 액추에이터, 플랫폼 위에서 지지부 상에 지지되고 연마 패드를 형성하기 위해 연속적인 공급 물질 층들을 디스펜싱하도록 구성되는 하나 이상의 프린트헤드, 플랫폼 위에 지지되는 복수의 개별적으로 어드레싱가능한 에너지 소스들, 및 제어기를 포함한다.  에너지 소스들은, 적어도 제1 축에 수직인 제2 축을 따라 연장되는 어레이로 배열되고 플랫폼을 향해 방사선을 방출하도록 구성된다.  제어기는, 액추에이터로 하여금, 하나 이상의 프린트헤드 및 에너지 소스들이 플랫폼에 걸쳐 스캐닝하도록 지지부와 플랫폼 사이의 상대적인 움직임을 생성하게 하도록 구성된다.
Patent KR-20190141223-A (KR)
Title: 디술피드 결합 환원을 최소화하는 항체 생산 방법
Inventor: FANN JOHN C
IPC: A61K39/395
Filed: 2018-04-24
Abstract: 본 개시내용은 정제 동안 항체를 함유하는 단일-사용 저장 백에 공기 오버레이 또는 헤드스페이스를 제공하는, 항체를 정제하는 방법을 개시한다.  구체적 실시양태에서, 본 출원은 원치 않는 디술피드 결합 환원을 감소시키는, 인간 TIGIT (Ig 및 ITIM 도메인을 갖는 T 세포 면역수용체)에 대한 항체, 예컨대 항체 22G2의 정제에 관한 것이다.  본 출원은 추가로 원치 않는 디술피드 결합 환원을 또한 최소화하는, 보다 낮은 처리량 및/또는 유량으로의 심층 여과를 제공한다.
Patent KR-20200003145-A (KR)
Title: 탄성파 필터 장치
Inventor: OZASA MOTOKI
IPC: H03H9/64
Filed: 2018-05-31
Abstract: 압전 기판(30) 상에 형성된 제1 탄성파 필터(10) 및 제2 탄성파 필터(20)를 갖는 탄성파 필터 장치(1)는, 압전 기판(30) 상에 형성되고, 유전율이 압전 기판(30)의 유전율보다 작은 절연층(40)과, 절연층(40) 상에 평면으로 보아 서로 대향하여 형성되고, 제1 탄성파 필터(10)의 전극에 접속된 제1 배선 도체(51) 및 제2 탄성파 필터(20)의 전극에 접속된 제2 배선 도체(52)와, 평면으로 보아 절연층(40) 상의 제1 배선 도체(51) 및 제2 배선 도체(52)에 외접하는 영역 A 내에 있어서, 절연층(40)과 압전 기판(30)의 사이에 형성된 접지 도체(60)를 구비한다.
Patent KR-20200101273-A (KR)
Title: 관형 전기 히이터 장비 유닛
Inventor: GAVRILIN VIKTOR ALEKSEEVICH
IPC: H05B3/02
Filed: 2018-09-13
Abstract: 본 발명의 장치는 전기 히터, 특히 원자로 안전 시스템의 전기 히터에 관한 것이다. 
본 발명의 목적은 원자력 발전소에서 10 단위의 신뢰성을 향상시키는 것입니다. 
기술 결과의 본 발명은 디바이스를 제공하는 감소한 열의 영향에서 가열 요소의 장비에 연구 결과의 관형 전기 히터가 결과적으로 온도를 낮추고 호스트 전기에 연결한다. 
나사 구멍과 부싱을 가진 플랜지(cover)를 포함하는 관형 히터의 블록에 있어서, 결론을 도출하고 보호 케이스를 구비한 견고하게 봉인된 관형 히터를 구비하고, 관형 전기 히터의 통찰력으로부터 플랜지상에 장착되며, 원통형 쉘이 장착된 관형 전기 히터의 통찰력으로부터의 모듈 플랜지 관형 전기 히터와, 상부의 반은 원통형 쉘의 내표면에 형성된 관통구멍이며, 관형 전기 히터용의 적어도 두 개의 구멍들을 가진 열 방패와, 상기 구멍의 지름은 관형 전기 히터 유닛의 플랜지 슬리이브의 외경을 초과한다. 
또한, 쉘의 크기는 장비의 열 절연체의 두께와 같거나 또는 그 보다 작다. 
또한, 보호 케이스가 관형 전기 히터의 단자 영역에 설치되며, 대규모 금속 부싱에 의해 타이트하게 접속된다. 
또한 열 방패 사이의 공간에 열 절연제를 설치하고 있다.
Patent KR-20210027010-A (KR)
Title: Apparatus and method for measuring glucose
Inventor: KIM DONG UK
IPC: A61B5/00
Filed: 2020-01-03
Abstract: The present invention relates to a device and method for blood glucose measurement. An objective of the present invention is to accurately correct the effect of a hemolytic agent during blood glucose measurement. The blood glucose measurement device for blood glucose concentration measurement includes: a sensor strip having a reagent layer containing a hemolytic agent and outputting a measurement current by reacting to blood; and an analysis device including a memory storing a first relationship value and a second relationship value defining the relationship between a hematocrit value and a hematocrit-related factor indicating the amount of change in current over time and storing a third relationship value defining the relationship between the hematocrit value and a post-correction current. The analysis device calculates the hematocrit-related factor based on the amount of change in the current reacting to the blood over time at the sensor strip, estimates the hematocrit value of the blood using the calculated hematocrit-related factor, the first relationship value, and the second relationship value, corrects the measurement current output at the sensor strip using the estimated hematocrit value and the third relationship value, and then performs blood glucose measurement using the corrected measurement current.
Patent KR-20200086224-A (KR)
Title: Method and Apparatus for Creating Smart Contract in Blockchain Using Natural language
Inventor: LEE JONG HEON
IPC: H04W16/14
Filed: 2020-01-06
Abstract: The present invention relates to a method for generating a blockchain smart contract based on a natural language that proposes, negotiates, modifies a blockchain smart contract based on a natural language and performs automatic generation and automatic execution and a device therefor. A smart contract generation device comprises a storage part, a document template editing part, and a meta smart contract part.
Patent KR-20210090501-A (KR)
Title: Exhaust duct and exhaust duct assembly and aircraft using the exhaust duct
Inventor: JOO YOUNG JUNG
IPC: F01D25/30
Filed: 2020-01-10
Abstract: The present invention relates to an exhaust duct, an exhaust duct assembly using the same, and an aircraft. Embodiments of the present invention provide the exhaust duct, the exhaust duct assembly using the same, and the aircraft. The exhaust duct according to one embodiment of the present invention, as the exhaust duct in which a combustion gas is branched and discharged from an inlet end to outlet ends on both sides, comprises: a first housing having a first body forming an outer wall of the inlet end, and a second body extending from the first body to both sides to form the outlet end; a second housing spaced apart from the first body, forming an inner wall of the inlet end, and curvedly extending toward the second body; and a connection housing connecting the first housing and the second housing, and having a depression unit recessed toward the inlet end from the outside. An object of the present invention is to provide the exhaust duct which satisfies excellent aerodynamic characteristics, stress characteristics, and lifespan characteristics, and the exhaust duct assembly using the same, and the aircraft.
Patent KR-20210091016-A (KR)
Title: Method for production of beer using rice and the rice beer thereof
Inventor: JEONG CHAN HEE
IPC: C12C11/02
Filed: 2020-01-13
Abstract: A method for manufacturing beer using rice according to the present invention comprises: an elution step of mixing 60 to 70 wt% of malt and 30 to 40 wt% of Koshihikari (Japanese short-grain rice cultivar) raw rice, followed by immersing the same in water at 50℃ to elute a saccharifying enzyme; a saccharification step of saccharifying the same after the elution step by gelatinization and saccharification at 65℃; a filtration step of inactivating and filtering the saccharification enzyme after the saccharification step; a boiling step of adding and boiling hops to the filtered and recovered saccharification solution after the filtration step; and a fermentation step adding yeast and fermenting after the boiling step.
Patent KR-20210097257-A (KR)
Title: System and method for abnormal signal notification around the vehicle
Inventor: KIM YOUNG EON
IPC: B60W40/10
Filed: 2020-01-29
Abstract: Disclosed are an anomaly signal around vehicle notification system and a method thereof. The anomaly signal around vehicle notification system according to an embodiment comprises: an external sound recognition module mounted on the outside of a vehicle to recognize a sound generated in a radius within a predetermined value from a point where the vehicle is located; a noise filtering module for filtering a noise classified as noise items based on identified detailed sound information; an abnormal signal detection module for identifying the detailed sound information including a source, a size, and a type of the detected sound, and detecting an auditory anomaly signal including a noise, an impact sound, a high voice, and an anomaly noise above a certain decibel, after filtering; and a notification module for notifying the type, the size, and a generation location of the auditory anomaly signal with at least one of a visual signal and an auditory signal. The embodiment provides the system for visually notifying the auditory anomaly signal (external acoustic signal) corresponding to a dangerous situation occurring in a vicinity of the vehicle.
Patent KR-20210101013-A (KR)
Title: Vehicle height keeping device
Inventor: LEE YOUNG MO
IPC: B60S9/04
Filed: 2020-02-07
Abstract: Disclosed is an apparatus for maintaining a horizontal height of a vehicle. According to an embodiment of the present invention, an apparatus for maintaining a horizontal height of a vehicle comprises: a support frame supported on the ground; a lifting frame which is hinged to the support frame and rotates, and has a groove into which the vehicle wheel is inserted; a lifting operation shaft having a lower end coupled to the support frame, screwed to a mounting portion of the lifting frame, and coupled in the longitudinal direction; and a handle for adjusting the angle of the lifting frame by rotating the lifting operation shaft. Accordingly, the height of each wheel can be easily adjusted individually to level the vehicle after stopping the vehicle during outdoor activities such as camping, so it can be easily applied to the change in width according to the ground condition and the length to wheels of different sizes, thereby significantly improving the versatility.
Patent KR-20210103722-A (KR)
Inventor: KIM YANG MAN
IPC: B32B37/14
Filed: 2020-02-14
Abstract: The present invention relates to a method for manufacturing a mat using PVC and PE foam and a mat manufactured thereby. The present invention is to make sure that the bonding of individually molded PVC foam and PE foam can be made more firmly, so that a high-quality mat can be manufactured. The method comprises the following steps of: positioning a PE film (20) between a PVC foam (10) and a PE foam (30) molded to a certain thickness, wherein PE film (20) includes an adhesive (21) applied to an opposite surface of the PVC foam; integrally bonding the PVC foam (10) and the PE foam (30) to each other by applying heat to the PVC foam (10) and the PE foam (30) while simultaneously compressing the PVC foam (10) and the PE foam (30).
Patent KR-20210065812-A (KR)
Title: Method for detecting input current of 3-phase pwm inverter using real time estimation technique of junction temperature and 3-phase pwm inverter system
Inventor: LEE GEUN HO
IPC: G01K7/22
Filed: 2020-02-20
Abstract: The present invention relates to a current measurement method for a three-phase pulse width modulation inverter using a real-time switch junction temperature estimation technique, and a three-phase pulse width modulation inverter system. A current measurement method in accordance with an embodiment of the present invention comprises the steps of: calculating a power loss of a switch of an inverter; estimating a junction temperature (T_j) of the switch by using a thermal equivalent circuit based on a negative temperature coefficient (NTC) resistance; estimating a resistance (R_ds on) value between both ends of a drain and a source by using a resistance (R_ds on) map based on the junction temperature (T_j) and a drain current (I_D), and a voltage (V_gs) between the gate and the source; when a lower switch of the inverter is turned on, a voltage (V_ds) generated between both ends of the source and the drain and the voltage (V_gs) between the gate and the source; calculating a current value based on the estimated resistance (R_ds on) and the voltage (V_ds) measured between the drain and the source; and using, as a control signal of the inverter, the calculated current value.
Patent KR-20200111619-A (KR)
Title: Vacuum bellows hot valve
Inventor: IIJIMA KAZUO
IPC: F16K51/02
Filed: 2020-02-25
Abstract: The present invention is to provide a vacuum bellows hot valve capable of adjusting the temperature of a valve with high precision without impairing durability or drivability against an increase in temperature and voltage of a heating means, while having a simple and compact configuration. The vacuum bellows hot valve is configured as follows. A stem is installed to be moved up and down in a valve box having an inlet and an outlet. A valve body installed at the lower end of the stem and the bellows on an outer circumference side of the stem are installed to be expanded and contracted. A cylindrical ceramic heater is installed between the inner circumference of the bellows and the outer circumference of the stem. A temperature measuring part of the thermocouple for control is arranged at a position near the valve body.
Patent KR-20210108281-A (KR)
Title: Diagnostic Monitoring System for Cognitive Impairment Server and Diagnostic Monitoring Method For The Same
Inventor: KIM YOUNGJOO
IPC: G16H40/67
Filed: 2020-02-25
Abstract: According to the present invention, a cognitive impairment diagnostic monitoring system includes: a voice output unit (10) for outputting a question about orientation having a function of recognizing time and place and surroundings in relation thereto as voice; a voice input unit (20) to which a user's voice responding to the question about orientation output from the voice output unit (10) is input; and a server (30) which stores a question content for orientation, outputs at least one question content among the question content through the voice output unit (10), recognizes a user's voice input through the voice input unit (20), and analyzes the user's voice to determine cognitive impairment. Accordingly, it is possible to reduce cost and time, as well as improve the reliability of cognitive impairment determination.
Patent KR-20210111438-A (KR)
Title: System and method for providing subscription transporation services
Inventor: CHOI KYONG ON
IPC: G06Q20/34
Filed: 2020-03-03
Abstract: The present invention relates to a system and method for providing a subscribing transportation service. The system comprises: a traffic product management server which generates subscription information for a user based on a subscription traffic product join request signal transmitted from a user terminal, transmits the generated subscription information to a card company server, and receives billing amount information for each user from the card company server; and a card company server which receives usage detail information from a transportation fee settlement system, calculates billing amount information for each user based on the usage detail information, and transmits the calculated billing amount information for each user to the traffic product management server. The card company server calculates billing information in a subscription product for usage information in the subscription product to which the subscription traffic product subscribed by the user is applied, and billing information other than the subscription product for usage information other than the subscription product to which the subscription traffic product is not applied, based on the usage detail information received from the transportation fee settlement system, calculates the billing information for each user by subtracting the billing information other than the subscription product from the billing information included in the usage detail information, and transmits the billing information to the traffic product management server. The traffic product management server settles a billing amount based on the billing amount information for each user to the card company server. Therefore, the user convenience can be increased.
Patent KR-20210113766-A (KR)
Title: Method for controlling inverter circuit and electronic device thereof
Inventor: YANG JUN MO
IPC: H02M7/48
Filed: 2020-03-09
Abstract: The present invention relates to an inverter circuit control method and an electronic device for the same. The electronic device includes: first to third inverter circuits; a switch circuit operatively connected to the third inverter circuit; a first microcontroller operatively connected to the first inverter circuit and the switch circuit; and a second microcontroller operatively connected to the second inverter circuit and the switch circuit. In a case where the occurrence of an abnormality in the first inverter circuit is identified, the first microcontroller cuts off power supply to the first inverter circuit and transmits a control signal to the switch circuit to increase the output of the third inverter circuit. In a case where the occurrence of an abnormality in the first inverter circuit is identified, the second microcontroller increases the output of the second inverter circuit and transmits a control signal to the switch circuit to increase the output of the third inverter circuit. The switch circuit provides either the control signal received from the first microcontroller or the control signal received from the second microcontroller to the third inverter circuit so that the output of the third inverter circuit increases. Various other embodiments are also possible.
Patent KR-20210113850-A (KR)
Title: Smart running hat and health care system using the same
Inventor: OH TAE KYEONG
IPC: A61B5/024
Filed: 2020-03-09
Abstract: The present invention relates to a smart running cap capable of suggesting the appropriate amount of exercise for a user's health condition and a healthcare system using the same. According to the present invention, the smart running cap comprises: a main body part (100) coming in direct contact with a user's head; a cap part (200) protruding from the front portion of the main body part (100); a bone conduction module (300) provided in the cap part (200); and a battery part (400) supplying power to the bone conduction module. The main body part (100) includes a voice signal output unit (110) formed of a bone conduction speaker disposed on both sides and a heart rate sensor (120) disposed at a predetermined distance from the voice signal output part (110) and measuring the user's heart rate. The bone conduction module (300) includes: a GPS signal processing unit (310) receiving and processing GPS signals; a heart rate signal processing unit (320) receiving and processing a heart rate signal from the heart rate sensor (120); a voice signal processing unit (330) transmitting a voice signal to the voice signal output unit (110); and a wireless transmission/reception module (340) capable of communicating with an external terminal (500).
Patent KR-20210115663-A (KR)
Title: Method for preparing a polyamideimide mixture with improved mechanical properties
Inventor: CHUNG CHAN MOON
IPC: C08J3/20
Filed: 2020-03-16
Abstract: The present invention relates to a method for preparing a polyamide-imide mixture with improved mechanical properties. More particularly, the method comprises: a polyamide-imide solution preparation step of preparing a solution of hyperbranched polyamide-imide; a polyamide-imide powder preparation step of immersing the solution prepared through the polyamide-imide solution preparation step in a mixed solvent and vacuum-drying the precipitate; and a blending step of mixing a linear polyimide powder with the hyperbranched polyamide-imide powder prepared through the polyamide-imide powder preparation step in an organic solvent. The polyamide-imide mixture prepared through the above process uses hyperbranched polyamide-imide, thereby improving mechanical properties such as tensile strength and elastic modulus due to an increase in entanglement of the branches and chains of the polymer.
Patent KR-20210116069-A (KR)
Title: An electronic device for providing a message chat service and a method thereof
Inventor: Suha YOON
IPC: H04L27/34
Filed: 2020-03-17
Abstract: Various embodiments of the present disclosure relate to an electronic device for controlling the transmission power of at least a part of symbols transmitting data and a reference signal in one uplink, and a control method thereof. The electronic device may acquire a modulation method to be used for transmission of a data symbol in the uplink, adjust transmission power for a part of data symbols and reference signal symbols to be transmitted in one transmission unit in consideration of a structure of an uplink channel when the acquired modulation method has a relatively small peak-to-average power ratio (PAPR) compared to other modulation method, and multiplex and transmit the data symbols and reference signal symbols to the uplink channel using the adjusted transmission power.
Patent KR-20210111656-A (KR)
Inventor: MIN SUNG GI
IPC: E02B15/10
Filed: 2020-03-22
Abstract: The present invention relates to a means for cleaning a floating matter on a surface of the sea, which eco-friendly restores an ecosystem, comprising: first and second work lines (175, 275); an excavator (212) connected to a crane (177) by a rope; a frame box (186) for forming a seating space (205); and a bottom plate (266) protruding outward from a frame (183).
Patent KR-20210121842-A (KR)
Inventor: CHOI JUNG HWA
IPC: B60L53/35
Filed: 2020-03-31
Abstract: Provided are a vehicle charging method using reinforcement learning and a system thereof. The vehicle charging method comprises the following steps of: receiving a charging request of a new vehicle; and determining charging status of the new vehicle and charging priority thereof inside a charging cue for the charging request using a charging learning model generated based on previous charging request history of the new vehicle and charging status of a charging vehicle placed inside the charging cue. The present invention efficiently arranges charging priority of an electric vehicle.
Patent KR-20210123724-A (KR)
Title: liquefied gas treatment system and ship having the same
Inventor: PARK JONG WAN
IPC: B63H21/38
Filed: 2020-04-03
Abstract: The present invention relates to a gas treatment system and a ship having the same, which may comprise: a liquefied gas storage tank which stores liquefied gas therein, and has a pump for discharging liquefied gas; an evaporation gas compressor which compresses evaporation gas generated in the liquefied gas storage tank to supply the same to an engine; a forcible vaporization device which heats the liquefied gas discharged by the spray pump; a mist separator which performs gas-liquid separation with the liquefied gas heated in the forcible vaporization device; and a gas heater which heats the gas-phase liquefied gas separated in the mist separator to deliver the same downstream of the evaporation gas compressor. The mist separator is characterized by delivering the gas-phase liquefied gas to upstream of the evaporation gas compressor corresponding to the operation state of the gas heater. Therefore, excellent stability and reliability can be guaranteed.